sister slap

A sister slap is a slap that may be administered by an older sister to a younger sister, when said younger sister is acting a fool

Yo, my younger sister got a speeding ticket so I gave her a sister slap...across her face

by Louroo October 20, 2013

Sister slap

When someone wants to slap someone but they’re too close to you so you don’t.

I want to sister slap my best friend but she’s my bestie so I can’t.

by itchyboa January 24, 2019

National Slap Your Sister Day

On October 25th you can slap your sister all you want and you won’t get in trouble.

Hey why is your sister crying

Because I slapped her for National Slap Your Sister Day

by boppotheclown October 24, 2020

National slap your sister day

July 24 you can slap your sister

Hey its national slap your sister day, go ahead.

by alpha alpha alpha July 24, 2021

National slap your sister day

Slap your sister today!

July 24th

National Slap your sister day is today!

by Himynameiskyle July 24, 2021

National Slap Your Sister Day

On the 10th of August, after National Slap Your Brother Day, is National Slap Your sister day. It is a day where you, as it says in the title, a day to slap your female siblings.

Me:"It's National Slap Your Sister Day"
My sister: Shit...

by EpicCommie August 9, 2021

sister slapper

When you live in Alabama and have incestual interactions with your sister.

You must be a sister slapper because you and your sister had sex last night!

by EVIL Ma January 12, 2019